A new SEC rule around altcoin ETFs may have an impact on the upcoming ETFs of cryptocurrencies such as Litecoin (CRYPTO: LTC), XRP (CRYPTO: XRP), Solana (CRYPTO: SOL), Cardano (CRYPTO: ADA), and Dogecoin (CRYPTO: DOGE). What Happened: CryptoAmerica journalist Eleanor Terrett reported on Monday that the SEC had asked altcoin ETF applicants to withdraw their 19b-4 filings.